Bird feeder



FIG. 1 is a perspective view taken from the top of a bird feeder showing my new design;

FIG. 2 is a front elevational view thereof, the rear being the same as the front shown;

FIG. 3 is a left side elevational view thereof, the right side being the same as the left side shown;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a top plan view thereof. 

The ornamental design for a bird feeder, as shown and described. 